The stakes have never been higher for the 110kg fighting machine from Woodridge near Logan, with a world heavyweight title within his sights.

The winner of the fight between Leapai and Boystov this Saturday will earn the opportunity to stand in the opposite corner to one of the biggest names in the sport, Wladimir Klitschko, for the world heavyweight title.

Leapai's Tenthill-based trainer Noel Thornberry said for now the focus was strictly on toppling Boystov, of which he was confident.

"We like to fight against Denis because he is a big puncher and he comes straight out of the gates and fights," Thornberry said.

"Alex is the best fighter in the world when it comes to a toe-to-toe and, if it comes down to that, he'll win."

However, Thornberry was well aware of the gravity of the situation, with a win sending him straight into a world championship bout.

"There is a hell of a lot at stake and for Alex to be in the corner on a decider for the No. 1 position it's a big deal," he said.

Despite the pressure, Leapai said he was confident of knocking out Boystov this weekend.

"It's a fight that everybody is searching for and for an opportunity to do that is great," Leapai said. "I'm definitely looking forward to it.

"Its going to be a tough fight but I'm confident.

"It's a fight where one of us has to put the other out to win, and I'm going to knock him out."

Leapai is keen to put Australian boxing on the map in the revered weight division.

"It's not every day an Australian heavyweight gets an opportunity like this," he said.

"Over in the US, England and Germany they don't even look at our area, especially in the heavyweight division, and I want to change that.

"I'm from Down Under and we can fight. Maybe I can be the one to lead the way for Australian heavyweights."